Square steel pipe, thick-walled square steel pipe, large diameter square steel pipe, seamless square steel pipe, low-alloy square steel pipe, 135*135*10 square steel pipe, square steel pipe for tower crane, Q345B low-alloy square steel pipe, 20# seamless square steel pipe , As the name implies, it is a square tube type. Many kinds of materials can form a square tube body. It is used for the medium, what is it used for, and where it is used. , Decorative square tube, construction square tube, etc.
Square pipe is a name for square pipe, that is, steel pipes with equal sides. It is made by rolling steel strip after process treatment. Generally, the strip steel is unpacked, flattened, crimped, and welded to form a round tube, then the round tube is rolled into a square tube and then cut to the required length. Usually 50 pieces per pack.
The square steel pipe is a hollow square cross-section light thin-walled square pipe, also known as steel refrigerated bending section. It is a section steel with square cross-section shape and size made of Q235 hot-rolled or cold-rolled strip or coil as the base material, which is formed by cold bending and then high-frequency welding. Except for the thickening of the wall thickness of the hot-rolled extra-thick-walled square pipe, the corner size and edge flatness have reached or even exceeded the level of the resistance welded cold-formed square pipe. The service life of many steel products of rectangular tube is closely related to the degree of decarburization on the surface of the steel product. Although the service life of the square tube depends on the fatigue strength and wear resistance, when the decarburization on the surface of the square tube exceeds the standard, it will reduce the decarburization of the surface. Reinforced and wear-resistant carbides. Therefore, it will directly affect the performance of its use. Therefore, how to prevent the surface decarburization of steel products is a problem that must be paid attention to in the production process. Japanese wire rods can achieve no decarburization, and other imported wire rods can be decarburized. The layer is also between 0.02-0.04 mm, and the average depth of decarburization of our products has exceeded 0.05 mm. Therefore, measures must be taken to change this situation.
advantage
Compared with solid steel such as round steel, the square steel pipe is lighter when the bending and torsion strength is the same. Bicycle racks and steel scaffolding used in building construction, etc. The use of square steel pipes to manufacture ring parts can increase the utilization rate of materials, simplify the manufacturing process, and save materials and processing man-hours, such as rolling bearing rings and jack sleeves. Square steel pipes have been widely used for manufacturing.
shortcoming
Square steel pipe is also an indispensable material for all kinds of conventional weapons. Gun barrels and barrels are all made of square steel pipes. Square steel pipes can be divided into round pipes and special-shaped pipes according to different cross-sectional area shapes. Since the circle area is the largest under the condition of equal circumference, more fluid can be transported by the circular tube. In addition, when the ring section bears internal or external radial pressure, the force is relatively uniform. Therefore, most square steel pipes are round pipes. However, round pipes also have certain limitations. For example, under the condition of plane bending, round pipes are not as strong as square and rectangular pipes. Some agricultural machinery frameworks, steel and wood furniture, etc. often use square and rectangular pipes. According to different purposes, special-shaped square steel pipes with other cross-sectional shapes are required.